Analog layout generation: from design assistant to automated layout

This paper describes the development of an automatic analog layout system, ALDA2. The focus is on the three key processes in the ALDA2 design: flow-partitioning, floorplanning and physical assembly. The system has been implemented in Prolog and interfaced to Cadence DFW2 CAD framework; this enables ALDA2 to carry out layout planning and then control standard framework tools for basic physical assembly tasks such as routing and compaction.